How to pass User name and password in Windows batch for accessing Remote Desktop Connection (RDP)

Hi,
I have 55 Windows servers (xp 2000-03) , daily have to take remote (not vnc) of these servers for logs / event viewers / free space checking ( I do not want external software for this activity ) and prepared the Report for Audit purpose .
To input IP / Username /Password / Domain Name is time wasting activity .for that I tried to save these creditials in RDP connection Settings with diff. names. but these settings are getting cleared after 2-3 days / after rebooting the pc .. For that m planning to hv some batch file for the server connection access ,but not able to pass the Usename / password in mstsc , kindly help me .
Thanks in advance.

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